How much money I need!

Hi, I am student and moved to Japan and trying to find the job. My boyfriend completed his master’s and PhD at the University of Tokyo and is now working as a programmer at one of the biggest company in Japan since last year. I recently found out that his monthly take-home pay, excluding taxes and bonuses, is about 350,000 yen.

We are planning to get married within the next five years and have two children. I am currently job hunting, and since we don’t have much savings, we are considering taking out a housing loan of around 60 million yen.

My question is this: For a family of four living near Tokyo, how much would we realistically need for living expenses—total monthly spending, child-related costs, car expenses, insurance, etc.?

Because my boyfriend say if I earn around 30man yen in hand every month as my salary it's enough. We are earn around 70man in hand every month is enough. But I think after pay for a loan and take a flight to visit parents and raise up kids is not enough. How about your opinion?

by Racheljang12260